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Molded Case Circuit Breaker

For circuit breaker systems in commercial and industrial facilities, molded case circuit breakers are among the most widely used components for reliable overcurrent protection and electrical distribution. Molded case circuit breakers provide automatic circuit interruption during overload or short circuit conditions, protecting electrical systems and equipment from damage while enabling manual switching control. Electrical.com carries an extensive selection of molded case circuit breakers from all major manufacturers, including new, used, surplus, and re-certified options. These components are designed to meet the diverse needs of commercial buildings, manufacturing facilities, data centers, and industrial power distribution applications.
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Part Number
PRICE
Manufacturer
Amperage
Voltage
MGN61318
MGN61318
In Stock
From
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Schneider Electric
8
480
MGN61324
MGN61324
In Stock
From
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Schneider Electric
2
480
MGN61325
MGN61325
In Stock
From
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Square D
3
480
MGN61327
MGN61327
In Stock
From
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Square D
5
480
MGN61359
MGN61359
In Stock
From
$78.04
Square D
4
480
QOB220CAFI
QOB220CAFI
In Stock
From
$166.99
Schneider Electric
20
240
RLF36250U31F
RLF36250U31F
In Stock
From
$10,478.89
Schneider Electric
2500
600
20532
20532
Limited Stock
From
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Merlin Gerin
2
127
20543
20543
In Stock
From
$80.94
Square D
3
250
20544
20544
Limited Stock
From
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Square D
6
250
20546
20546
Limited Stock
From
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Square D
16
250
20549
20549
Limited Stock
From
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Schneider Electric
32
250
24364
24364
Limited Stock
From
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Merlin Gerin
20
440
24690
24690
Limited Stock
From
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Schneider Electric
25
440
24692
24692
Limited Stock
From
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Merlin Gerin
40
440
24693
24693
Limited Stock
From
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Merlin Gerin
50
440
25014
25014
Limited Stock
From
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Schneider Electric
20
440
28995
28995
In Stock
From
$51.35
Schneider Electric
40
600
28998
28998
In Stock
From
$121.52
Square D
80
600
31100
31100
In Stock
From
$91.66
Schneider Electric
100
750
31105
31105
In Stock
From
$11.46
Square D
160
750
31108
31108
In Stock
From
$97.97
Square D
320
750
31137
31137
In Stock
From
$32.32
Schneider Electric
400
600
31164
31164
In Stock
From
$0.29
Square D
160
690
Popular Molded Case Circuit Breaker Manufacturers

Electrical.com stocks the largest inventory of molded case circuit breakers in the world, with over 1 million square feet of new, used, surplus, and re-certified MCCBs available for immediate shipment. From standard thermal-magnetic breakers to electronic trip units across all amperage ratings, we have what you need when others say no. Our comprehensive molded case circuit breaker inventory spans all voltage and current ratings, frame sizes, and interrupting capacities from all major manufacturers including current production and discontinued models from legacy suppliers. Available in new factory condition, surplus stock, and re-certified options‚ All backed by our standard 2-year Electrical.com warranty. Our molded case circuit breakers serve critical applications across commercial buildings, industrial facilities, manufacturing plants, data centers, healthcare facilities, distribution panels, motor control centers, switchboards, and power distribution systems.


Whether you're maintaining legacy equipment with obsolete MCCB models or sourcing current production breakers for new installations and retrofits, our 40+ warehouse locations across the US and Canada ensure rapid delivery to minimize your downtime. Need molded case circuit breakers now? Call 877-999-7077 or email [email protected]. With same-day shipping available and the right parts ready to ship from our nearest warehouse location, Electrical.com gets your operations back online fast. We can say yes when others have to say no.